N-acetylcysteine

N-acetylcysteine

N-acetylcysteine, often called NAC, is a simple, widely used compound that helps the body make an important antioxidant called glutathione. It provides a form of the amino acid cysteine, which cells use to build glutathione and support many detoxifying and protective reactions. NAC can also act directly to neutralize harmful molecules and break certain bonds in mucus, which is why it is used in respiratory medicine and in treating acetaminophen overdose. People study NAC because it supports the body’s own antioxidant defenses, which tend to weaken with age and under stress. That support can help tissues handle oxidative damage and inflammation, and researchers are exploring whether NAC can help protect organs including the eyes, liver, and brain. The supplement is available over the counter in many places, but dose and safety depend on individual health, current medications, and specific reasons for use. Side effects are usually mild, such as stomach upset, but serious interactions are possible, so it’s wise to consult a health professional before starting NAC. Overall, NAC matters because it is a practical way to boost a key protective pathway in the body and is an active focus of research for preventing and treating various conditions.